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Alright, here's the deal. There are 6 cakes and one casing in a growing chamber. 5 of the cakes are doing fine with pinning just starting on most of them. The six cake is the one that I'm worried about. The problem started off as what I thought was just bruising (and still may be). All of my cakes were fairly dehydrated and had shrunk quite a bit, which I have read can cause some bruising on the surface of the mycelium. By setting them on the perlite off and on I think I have remedied this somewhat. The blueish are on the one cake is looking sort of greyish/blueish now which has me worried that it might be cobweb. Can bruised areas become slightly grey over time? Or should I throw this cake?
My friend would move it away (into another room) from all the other cakes in case it is contaminated and keep an eye on it. If you are worried that it is cobweb you might consider misting it with 3% hydrogen peroxide (h2o2). If you think in terms of risk:
1) Keep the cake and it is conaminated. Best case, you lose just the one cake. Worst case, you lose all your cakes.
2) Toss the cake and it is contaminated. Best case, you lose just the one cake. Worst case, you lose just the one cake.
3) Toss the cake and it is not contaminated. Best case, you lose one good cake. Worst case, you lose just one good cake.
Too my friend, it isn't worth risking all of the known good cakes just to see if one cake is good or bad.
Ignoring the above, my friend would guess based on your description (vague at best) that you are seeing overlay caused by the mycelium repairing itself after the bruising. If the grey starts to spread, then obviously it isn't just overlay. Cobweb moves fast! If you decide to keep the cake, keep a constant eye on it until you know what is going on one way or the other.
-------------------- Just another spore in the wind.
I have a pic of a dried out PF cake with blue/grey discoloration in the pic forum under PF cake..... It sounds to me that you have bruising. Cobweb will look like little hairs coming off of your cake. I am trying the dunk method with my PF cake, I have heard it does wonders for rehydration. I will be posting pis of the rehydrated cake in a couple of days.